IdentificationA black day is followed by a white day which gaps in the direction of the trend and closes below the midpoint of the black day.

The Psychology
The Thrusting pattern is a weaker version of the bearish On Neck and bearish In Neck continuation patterns. The bulls start to assert themselves as evidenced by the rally into the previous day's trading range, but by closing in the lower half of that range, the overall pattern is still bearish.